What the Bible is saying is that one who does not believe is both stupid and blind. He does not see what there is to see. Not only is he blind, but he is also likely to act blindly. He does not recognize any purpose in existence, and is therefore likely to act without direction. He does not recognize Truth, and is apt to do everything wrong. He is so unperceptive that he cannot be trusted. He says that there is no God because he is a fool. He is too blind to see God all around him; or else he is too selfish to share his own world with its Creator.

In the entire Bible, you will not find a single philosophical argument for the existence of God. It is simply assumed. The Bible does not waste time trying to convince the atheist that he is wrong. He is considered a fool, too dull to understand, or too wicked to want to.

"In the entire Bible, you will not find a single philosophical argument for the existence of God. It is simply assumed."

And that is the core of the problem. There is no evidence presented to support this position. There are threats (you'll burn in hell for eternity), and ad-hominems (one who does not believe is both stupid and blind, considered a fool, too dull to understand, or too wicked to want to...), but no evidence.

In the entire Bible, you will not find a single philosophical argument for the existence of God. It is simply assumed.

And that is why I think you are full of shit. I don't assume the existence of god, I need proof, and your side has never been able to provide any.
As for the old nugget about "the fool says in his heart there is no god."
I should be surprised a book trying to convince people to believe would call non-believers anything else?

Considering that Yhwh was regarded as a particular TRIBAL god (remember: the original Hebrews were henotheists, NOT monotheists), it probably wasn't considered necessary.

I don't think you'll, meanwhile, find a lot of native North American legends that argue in that sense for the existence of manitous. Or Greek legends that argue for the existence of the theoi. Or Shintou legends that argue for the existence of the kami. Or Kemetian legends that argue for the existence of the neterw. And so on. Formal logic was in its infancy back then, remember that.

In other words, you are expected to believe without proof or evidence. Most believers who go down this road at least claim that everyone knows in their hearts that God exists, but this argument doesn't even have that. It is literally argumentum ad baculum and victim-blaming in their purest forms. Surely it must be just a coincidence that those are the most despicable of all logical fallacies...?

And that is exactly what is wrong with the Bible. It does not offer any convincing evidence that God exists except for "This book proves God exists." It tries to use lots of fear and intimidation, but no solid proof.

"In the entire Bible, you will not find a single philosophical argument for the existence of God. It is simply assumed."

No, it's baldly asserted by the Levis. "Oy! We're so cursed! We can't do real work! And by the way, God wants a nice lamb and half a chicken. None of those vegetables now! Make with the "sacrifice"! We ain't got all day! Or, you could write a check?"

You're stupid and blind. We do not see what there is not to see. You act blindly. You do not recognize any purpose in existence without your fairy tales. You do not recognize the truth and typically do everything wrong. You are so unperceptive that you cannot be trusted. You say there is a God because you are a fool. You are too blind to see that there is no God anywhere, your else you are too selfish to share your own world with anyone who thinks differently.